Growers - how do you prevent moss in containers?
Sure could use some tips for preventing moss from growing on the top of the soil inside containers. I've got a huge crop of 4" lavenders to grow on/overwinter and since I'm in the Pacific northwest now, seems I've got this challenge to meet. Do any of you have a solution for moss prevention? I've heard of using sand or "chicken grit" (like aquarium sand) as a top dressing, but this would add a tremendous amount of weight to each flat, plus, it is prone to washing out easily when using a watering wand.
Anybody heard of doing a copper drench?
My preference would be for an *organic* solution....
Thanks much for any tips.